add and set up shopping cart

Hello all, i have basically set up my business merchant account using onlybusiness.com.......everything is set up ...all accept the shopping basket...im very confused...the shopping cart was included but i need paypal standard to accept credit cards thing iz...when using this site they are requesting that i re-enter pics, pricing, qty? and so? on... as if im creating a total new shopping cart...i already have one via onlybusiness.com...i need someone to set? this up for me....and also inform me on how to keep my inventory updated via the paypal standard method. this job seems to be fairly simple however....im a bit confused...need job done as soon as possible! ## Deliverables Please respond with questions if what has been? requesting is unclear.